This first-in-human study will evaluate the recommended dose, safety, and effects (good and bad) of an experimental drug, BLU-222, either alone or in combination with therapies approved for some types of cancer, including carboplatin, ribociclib, and fulvestrant, to find out if these are safe and effective ways to treat nonresectable (unable to be removed with surgery) advanced solid tumors, including ovarian, endometrial, and estrogen receptor positive (ER+) or human epidermal growth factor receptor 2 negative (HER2-) breast cancer. All subjects participating in this research study will...